checkblock
nounUK /ˈtʃɛkblɒk/
US /ˈtʃɛkblɑːk/
A checkblock is a small block you use to mark or check something.
She put a checkblock next to each name on the list.
OTHER MEANINGS
2. A block used in printing to check alignment.
The printer adjusted the checkblock before the run.
3. A wooden block used to hold something steady while you check it.
He set the board on a checkblock to inspect the edge.
4. A small square on a form where you put a check mark.
Fill in the checkblock if you agree.